This option is promoted to a mode of operation. Instead
of specifying a configuration file and a path to the
backup data, now you specify the location of the backup
data with the --backup-dir option, and
the configuration parameters are read from your default
configuration file.

This option is promoted to a mode of operation. Instead
of specifying a configuration file, now you specify the
location of the backup data with the
--backup-dir option, and the
configuration parameters are read from the
backup-my.cnf configuration file
that mysqlbackup creates in that
directory.

This former combination of options is promoted to a mode
of operation. Instead of supplying the paths of two
user-created configuration files, you specify the
location of the incremental and full backup directories
with the --incremental-backup-dir and
--backup-dir options. The configuration
parameters are read from the
backup-my.cnf files that
mysqlbackup creates in those
directories.